Describing a higher level in a hierarchical management structure

(chiefly UK) A railway track; a pair of rails on which a railway train runs.

Alternative spelling of down line

Describing a lower level in a hierarchical management structure

plural of in-line skate

A division in altitude (or latitude) above which trees tend not to grow on mountains.

An ordered sequence of named people who would succeed to a particular office upon the death, resignation or removal of the current occupant; constructed using the rules of an established order of succession.

(tennis, badminton) The line, in tennis and similar sports, from behind which the ball is initially served and which the feet must not cross when serving.

(mathematics) A line that graphically represents the real numbers as a series of points whose distance from an origin is proportional to their value

A firm stance or policy on which one will not compromise